DatasheetLT6236, LT6237, LT6238 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Rail-to-Rail Output 215MHz, 1.1nV/√Hz Op Amp/SAR ADC Driver |
| Pages / Page | 26 / 1 — FeaTures. DescripTion. Low Noise: 1.1nV/√Hz. Low Supply Current: … |
| File Format / Size | PDF / 1.6 Mb |
| Document Language | English |
FeaTures. DescripTion. Low Noise: 1.1nV/√Hz. Low Supply Current: 3.5mA/Amp Max. Low Offset Voltage: 350µV Max. applicaTions
Model Line for this Datasheet
- LT6236CS6#PBF LT6236CS6#TRMPBF LT6236CS6#TRPBF LT6236HS6#PBF LT6236HS6#TRMPBF LT6236HS6#TRPBF LT6236IS6#PBF LT6236IS6#TRMPBF LT6236IS6#TRPBF
Text Version of Document
LT6236/LT6237/LT6238 Rail-to-Rail Output 215MHz, 1.1nV/√Hz Op Amp/SAR ADC Driver
FeaTures DescripTion
n
Low Noise: 1.1nV/√Hz
The LT®6236/LT6237/LT6238 are single/dual/quad low n
Low Supply Current: 3.5mA/Amp Max
noise, rail-to-rail output op amps that feature 1.1nV/√Hz n
Low Offset Voltage: 350µV Max
input referred noise voltage density and draw only 3.5mA n Fast Settling Time: 570ns to 18-Bit, 2VP-P Output of supply current per amplifier. These amplifiers combine n Low Distortion: THD = –116.8dB at 2kHz very low noise and supply current with a 215MHz gain n Wide Supply Range: 3V to 12.6V bandwidth product and a 70V/µs slew rate. Low noise, fast n Output Swings Rail-to-Rail settling time and low offset voltage make this amplifier n 215MHz Gain-Bandwidth Product optimal to drive low noise, high speed SAR ADCs. The n Specified Temperature Range: –40°C to 125°C LT6236 includes a shutdown feature that can be used to n LT6236 Shutdown to 10µA Max reduce the supply current to less than 10µA. n LT6236 in Low Profile (1mm) ThinSOT™ Package This amplifier family has an output that swings within n Dual LT6237 in 3mm × 3mm 8-Lead DFN and 8-Lead 50mV of either supply rail to maximize the signal dynamic MSOP Packages range in low supply applications and is specified on 3.3V, n LT6238 in 16-Lead SSOP Package 5V and ±5V supplies. The LT6236/LT6237/LT6238 are upgrades to the LT6230/
applicaTions
LT6231/LT6232, offering similar performance with reduced n wideband noise beyond 100kHz. 16-Bit and 18-Bit SAR ADC Drivers n Active Filters L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property n Low Noise, Low Power Signal Processing of their respective owners.
Typical applicaTion Differentially Driving a SAR ADC LT6237 Driving LTC2389-18 fIN = 2kHz, –1dBFS, 32768-Point FFT
V + S = 6V 0 V IN+ + –10 OUT = 7.3VP-P HD2 = –129.5dBc LOWPASS FILTERS –20 1/2 LT6237 –30 HD3 = –118.7dBc 38.3Ω 49.9Ω SFDR = 117.7dB – –40 THD = –116.8dB –50 SNR = 99.7dB 270pF IN+ 18-BIT –60 SINAD = 98.9dB –70 LTC2389-18 –80 270pF IN– 2.5Msps –90 38.3Ω 49.9Ω –100 – AMPLITUDE (dBFS) –110 623637 TA01a 1/2 LT6237 –120 –130 IN– + –140 V – –150 S = –2V 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 FREQUENCY (MHz) 62367 TA01b 623637fb For more information www.linear.com/LT6236 1
FeaTures DescripTion
n
Low Noise: 1.1nV/√Hz
The LT®6236/LT6237/LT6238 are single/dual/quad low n
Low Supply Current: 3.5mA/Amp Max
noise, rail-to-rail output op amps that feature 1.1nV/√Hz n
Low Offset Voltage: 350µV Max
input referred noise voltage density and draw only 3.5mA n Fast Settling Time: 570ns to 18-Bit, 2VP-P Output of supply current per amplifier. These amplifiers combine n Low Distortion: THD = –116.8dB at 2kHz very low noise and supply current with a 215MHz gain n Wide Supply Range: 3V to 12.6V bandwidth product and a 70V/µs slew rate. Low noise, fast n Output Swings Rail-to-Rail settling time and low offset voltage make this amplifier n 215MHz Gain-Bandwidth Product optimal to drive low noise, high speed SAR ADCs. The n Specified Temperature Range: –40°C to 125°C LT6236 includes a shutdown feature that can be used to n LT6236 Shutdown to 10µA Max reduce the supply current to less than 10µA. n LT6236 in Low Profile (1mm) ThinSOT™ Package This amplifier family has an output that swings within n Dual LT6237 in 3mm × 3mm 8-Lead DFN and 8-Lead 50mV of either supply rail to maximize the signal dynamic MSOP Packages range in low supply applications and is specified on 3.3V, n LT6238 in 16-Lead SSOP Package 5V and ±5V supplies. The LT6236/LT6237/LT6238 are upgrades to the LT6230/
applicaTions
LT6231/LT6232, offering similar performance with reduced n wideband noise beyond 100kHz. 16-Bit and 18-Bit SAR ADC Drivers n Active Filters L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property n Low Noise, Low Power Signal Processing of their respective owners.
Typical applicaTion Differentially Driving a SAR ADC LT6237 Driving LTC2389-18 fIN = 2kHz, –1dBFS, 32768-Point FFT
V + S = 6V 0 V IN+ + –10 OUT = 7.3VP-P HD2 = –129.5dBc LOWPASS FILTERS –20 1/2 LT6237 –30 HD3 = –118.7dBc 38.3Ω 49.9Ω SFDR = 117.7dB – –40 THD = –116.8dB –50 SNR = 99.7dB 270pF IN+ 18-BIT –60 SINAD = 98.9dB –70 LTC2389-18 –80 270pF IN– 2.5Msps –90 38.3Ω 49.9Ω –100 – AMPLITUDE (dBFS) –110 623637 TA01a 1/2 LT6237 –120 –130 IN– + –140 V – –150 S = –2V 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 FREQUENCY (MHz) 62367 TA01b 623637fb For more information www.linear.com/LT6236 1
